Spool for photographic camera films and similar purposes



Sept. 7, 1926. 1,599,271

T. G. BAXENDEN SPOOL FOR PHOTOGRAPHIC CAMERA FILMS AND SIMILAR PURPOSES Filed Sept. 27, 1924 Patented Sept. 7, 1926.

UNFIF'TYEDWSTATTES P TENT OFF-ICE.

THOMAS GEORGE BAXENDEN, on werronn, ENGLAND.

SPOOL FOR PHOTOGRAPHIC CAMERA FILMS AND SIMILAR PURPOSES.

1 Application filed September 27, 1924, Serial No. 740,288, and in Great-Britain April 30, 1924'.

This invention relatest-o spools for photographic camera films and similar' purposes, and the invention has for'its object to provide an improved type of spoolwhich will be less costly to manufacture than those at present in use. For conveniencev of description the invention will be described as applied to spools for photographic hand cameras. I 1

According to the present invention instead of being made of wood as hitherto the cylindrical body part of the spool is made of a metal tube, preferably. rolled up or otherwise constructed from a flat metal blank or blanks, and end flanges are attached to the said cylindrical body part in any suitable manner. I

The end flanges may consist of discs perto rated with apertures of the required shape for receiving the winding key and pivot pin by whichthe spool is supported in the camera.

The said end discs will be secured to the tubular body part of the spool by welding, soldering, by ears andslots, or in any other suitable manner.

The meeting edges of the rolled up blank which forms the body part of the spool may overlap, and,- if desired, one of the said edges may be cutaway orr-ecessed to provide the slot for receiving the end of the film which is to be wound on the spool.

These slots may however be provided in any other suitable manner by forming them in the blank so as to occupy the required position when the said blank is formed into a tube.

I will now describe several forms of the invention with the aid of the drawings, in which,

Fig. 1 is a side view partly in section showing one form of the improved spool.

Fig. 2 is an end view of Fig. 1. Fig. 3 is a section on line X-X of Fig. 1 looking from the left.

Fig. 4 is a plan of the blank from which the body of the spool is made.

Fig. 5 is a side view partly in section showing a modified construction.

Fig. 6 is an end view of Fig. 5. i

Fig. 7 is a side view of a further modifica- I tion. 7 Referring to Figs. 1 to 4, the cylindrical body part a of the spool is in the form of a accompanying tube" rolled u from a'fiat metal blank'such as shown in ig. 4:. One'edge of the said blank is cut away or recessed so as to leave end projections b which when the blank is rolled up into tubular form overlaps the adjacent edge, whilst the cutaway portion remains spaced apart from saidedge and thus provides aslot 0 through which the end ofa" lilm ispassed when the same is to be wound;

upon the spool'in the-usual manner.

The flanges of the spoolare formed" by end dlSCS d and e which may be attached to the body part a by soldering, welding, or in any other suitable manner One end disc, say d, is perforated centrally with a slot 7 of the usual shape for receiving the end of thehusu'al winding key of a film camera, and the other disc'e is perforated with a central hole 9 torfitting over the I usual pivot pin.

Figs. 5 and 6 showv a construction similar to that shown in Figs. 1 to a except thatthe ends of the tube forming thev cylindrical,

Fig. 7 shows a further modification, wherein one of the meeting edges of. the tube tormmg the body part a of the spool. is formed with dovetailed projections Z) adapted to "interlock with corresponding recesses in the other edge. The slot 0 for receiving the end of the film is in this case formed by making the recess between the end ,projec tions 6 deeper than the corresponding projection on the opposing edge.

In the construction accordin' to Fig. 7 the joined edges of the tube orming the body part a come fiushwith one another, and in the tormshown in Figs. 1 to 6 the overlapping edges, may be allowed to lie one upon the other or the overlapping parts may be forced oneinto the other to provide a flush or practically flush surface.

According to another construction (not illustrated) the tubeforming the cylindrical body part of the spool may be-made in two semicircular halves welded or otherwise oined together at their edges.

Alternatively the tubular body of the .spool may be for'n'ledfrom a blank and have its edges chi led and} clipped tog-ether or joined by a double folded or milk 'eanseani.

Instead of the central part of the end discs being cut out to reeeivethewvinding key and pivot pin, the endsof. the tube forming the cylindriea f body purebrthe' s-po'ol in'aybe turned inwards and appropriately shaped "for this purpose; the end diss being in this case: formed with: a cir u ar ho e and. flanged or notas required.

What I claim as my invention and desire to secure by Letters Patent is A spool eomprising a tubular body part having dovetail recesses in one edge and dovetail projections-011 the other edge thereoi fittng-intosaid? recesses, said dovetail re cesses being shallower than the depth of the "projections whereby to form an elongated slot at the adjaeentedges of the body part and between said projections, and end'flange attached to s idbody part. 1 a v THOMAS GEORGE BAXENDEN. 

